Front Door Key Cylinder Switch LH Check

WARNING: This page is about a different car, the 2007 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FRONT DOOR KEY CYLINDER SWITCH LH

With CONSULT-III

Check front door key cylinder switch ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in DATA MONITOR mode in CONSULT-III. Refer to "DATA MONITOR ".

When key inserted and front key cylinder is turned to LOCK:
KEY CYL LK-SW : ON
When key inserted and front key cylinder is turned to UNLOCK:
KEY CYL UN-SW : ON

Without CONSULT-III

Check voltage between BCM connector M18 terminals 7, 8 and ground.

BCM CONNECTOR TERMINAL VOLTAGE SPECIFICATION

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	( + )	( - )	Condition	Voltage (V) (Approx.)
M18	7	Ground	Neutral/Lock	5
	7		Unlock	0
	8		Neutral/Unlock	5
	8		Lock	0

Fig 1: Checking Voltage Between BCM Connector M18 Terminals 7, 8 And Ground

OK or NG

OK: Front door key cylinder switch LH signal is OK.

NG: GO TO 2.

CHECK FRONT DOOR KEY CYLINDER SWITCH LH GROUND HARNESS

Turn ignition switch OFF.
Disconnect front door key cylinder switch LH.

Check continuity between front door key cylinder switch LH connector D9 terminal 4 and body ground.

CONNECTOR TERMINAL CONTINUITY SPECIFICATION

Connector	Terminals	Continuity
D9	4 - Ground	Yes

OK or NG

OK: GO TO 3.

NG: Repair or replace harness.

Fig 2: Checking Continuity Between Front Door Key Cylinder Switch LH Connector D9 Terminal 4 And Body Ground

CHECK DOOR KEY CYLINDER SWITCH LH

Check continuity between front door key cylinder switch LH terminals.

CONNECTOR TERMINAL CONTINUITY SPECIFICATION

Terminals	Door key cylinder switch position	Continuity
4 - 6	Neutral/Unlock	No
4 - 6	Lock	Yes
4 - 5	Neutral/Lock	No
4 - 5	Unlock	Yes

OK or NG

OK: GO TO 4.

NG: Replace front door key cylinder switch LH. Refer to "FRONT DOOR LOCK ".

Fig 3: Checking Continuity Between Front Door Key Cylinder Switch LH Terminals

CHECK DOOR KEY CYLINDER HARNESS

Disconnect BCM connector M18.

Check continuity between BCM connector M18 (A) terminals 7, 8 and front door key cylinder switch LH connector D9 (B) terminals 5, 6 and body ground.

CONNECTOR TERMINAL CONTINUITY SPECIFICATION

Connector	Terminal	Connector	Terminal	Continuity
A: M18	7	B: D9	5	Yes
	8	B: D9	6	Yes
	7	Ground		No
	8	Ground		No

OK or NG

OK: Front door key cylinder switch LH circuit is OK.

NG: Repair or replace harness.

Fig 4: Checking Door Key Cylinder Harness